The utility model discloses a catalytic cracking reactor, which comprises a reactor cylinder 3, a spray nozzle 4, a horizontal outlet pipe 1, a catalyst inlet 8 and a reactor bottom 9. The spray nozzle 4 penetrating through the reactor bottom 9 enters the reactor cylinder 3; the spray nozzle 4 is connected with a raw material conveying pipe 5; and the catalyst inlet 8 is communicated with a regeneration catalyst conveying pipeline. The catalytic cracking reactor solves the problem of secondary cracking in catalytic cracking engineering in short contact time in the prior art.