  The thermodynamics and overcharging problem in the RN-AdS black hole with the
cloud of strings and quintessence are investigated by absorption of scalar
particle and fermion in the extend phase space. The cosmological constant is
treated as the pressure with a conjugate volume. Besides, the parameters
related to quintessence and cloud of strings are treated as thermodynamic
variables. Finally we find the first law of thermodynamics is satisfied and the
second law of thermodynamics is indefinite. Furthermore, the near-extremal and
extremal black holes can not be overcharged.
