The invention discloses a computer network signal transmission stabilizing device. The computer network signal transmission stabilizing device comprises a voltage stabilizer, wherein the voltage stabilizer is arranged in an inner cavity of a main body; the voltage stabilizer is electrically connected with a power line through a switch; the voltage stabilizer is electrically connected with a network filter and a signal enhancer respectively; the switch is movably arranged on a right side wall of the main body; the power line is positioned in a mounting hole in the right side wall of the main body; the network filter and the signal enhancer are arranged in the inner cavity of the main body; the network filter is connected with a signal input port and the signal enhancer through cables respectively; the signal enhancer is connected with a signal output port through a cable; and the signal input port and the signal output port are embedded into a back side wall of the main body. Through adoption of the computer network signal transmission stabilizing device, a voltage can be stabilized; signal transmission stabilization is facilitated; instant heat dissipation can be kept; and the influence on signal transmission caused by an over high temperature is avoided. Moreover, the stability of signal transmission is enhanced through signal filtering and signal enhancement.