In recent years, the use of ultrafast sensors with small dimensions for application in all-optical integrated circuits has attracted the attention of many researchers. In this paper, a proposed design of an optical switch based on a photonic crystal with two direct and crossed patterns using a combination of four resonators and two central and Add/Drop waveguides is presented. This photonic crystal is formed in the form of a square lattice with a lattice constant of 543 nm in the form of an arrangement of 21 × 29 dielectric rods in the X Z plane in air. These dielectric rods are made of silicon in air with a radius of 109 nm, a linear refractive index of 3.46, and a filling factor of 0.2. In this switch, the control factors include the radius and refractive index of the coupling, dispersion, and internal rods. The performance parameters of the optical switch such as normalized output power, bit rate, response time, extinction ratio, internal loss, and interference are analyzed using the Finite-difference time-domain method. In this proposed switch, the response time in the direct mode is 0.123 picoseconds and in the cross mode is 0.485 picoseconds. Also, the data transfer rate in the direct mode is 13.8 terabits per second and in the cross mode is 2.06 terabits per second. In this design, the range of crosstalk changes with the direct and cross logo is between -5.6 dB to -17.32 dB, the extinction ratio in the direct mode is between -9.031 dB to -6.82 dB and in the cross mode is between -31.2 dB to -13.8 dB.