The invention discloses a PLC frequency-converting speed-governing control system for eliminating tower-type crane load, based on an E1 time-delayed filter, which is developed by the following steps:establishing an inertia pole coordinate system, a non-inertia cartesian coordinate system and a non-inertia sphere coordinate system; establishing a nonlinear dynamics model and a linear dynamics model of a tower-type crane. The control system comprises an operation console, a controller, a PLC, a frequency-converting set, a hoisting mechanism motor, a brake, a hoisting mechanism, an amplitude varied mechanism motor, an amplitude varied mechanism, a swing mechanism motor and a swing mechanism. The controller consists of a load swing frequency and damping ratio calculation unit, a system parameter calculation unit and a time-delayed filter calculation unit. The invention provides the PLC frequency-converting speed-governing control system based on the dynamic property and the time-delayed filter principle of the tower-type crane, which has simple structure, low cost, convenient operation and effective elimination of load swing.