The utility model discloses a WIFI signal and CATV signal mixer comprising a CATV signal input port, a first WIFI signal input port, a second WIFI signal input port, a dual-outlet distributor, a quadri-outlet distributor, a first filter unit and a second filter unit. The CATV signal input port is connected to a signal input port of the dual-outlet distributor. Two signal output ports of the dual-outlet distributor are connected respectively to the first filter unit and the second filter unit. The first filter unit and the second filter unit are also connected to the WIFI signal input ports and the quadri-outlet distributor. The WIFI signal and CATV signal mixer is advantageous in that: the structure is simple, the design is clever, and the purpose of simultaneous input and output of WIFI signals and CATV signals is achieved through the use of several dispensers of different types and the use of the filter units.