Based on the plane-wave method,the optical properties of complete forbidden bands of woodpile structure photonic crystal with an entire lattice rotation of 45o in the x-y plane were theoretically studied in terms of height-to-pitch ratios,filling factors,and rotation angles. The calculated results show that the gap to mid-gap ratio changes slightly with a filling fraction ranging from 0.25 to 0.30. The optimum height-to-pitch ratio is about 1.3. The gap to mid-gap ratio reaches more than 0.18 when the rotation angle increases from 40o to 50o and the maximum gap to mid-gap ratio of 0.2 remains unchanged for the rotation angle from 420 to 48o with a constant height-to-pitch ratio of 1.3. The gap to mid-gap ratio reaches the maximum value of 0.2 when the height-to-pitch ratio is 1.3. This woodpile-type photonic crystal can provide large band gaps within a wider parameter range,which makes it convenient to manufacture three-dimensional photonic crystals in the laboratory. Based on the plane-wave method, the optical properties of complete forbidden bands of woodpile structure photonic crystal with an entire lattice rotation of 45o in the xy plane were theoretically studied in terms of height-to-pitch ratios, filling factors, and rotation angles . The calculated results show that the gap to mid-gap ratio changes slightly with a filling fraction ranging from 0.25 to 0.30. The optimum height-to-pitch ratio is about 1.3. The gap to mid-gap ratio reaches more than 0.18 when the rotation angle increases from 40o to 50o and the maximum gap to mid-gap ratio of 0.2 remains unchanged for the rotation angle from 420 to 48o with a constant height-to-pitch ratio of 1.3. The gap to mid-gap ratio reaches the maximum value of 0.2 when the height-to-pitch ratio is 1.3. This woodpile-type photonic crystal can provide large band gaps within a wider parameter range, which makes it convenient to manufacture three-dimensional photonic crystals in the laboratory.