One of the most common agricultural wastes in India, the state of Tamilnadu, is coconut shell (CS). The co-gasification of coconut shell and medical plastic waste (MPW), mixture appears to be a potential method for removing waste plastics. In a fluidized bed gasifier with an olivine catalyst as the bed material, the experimental works are carried out in air co-gasification of 50:50 wt% coconut shell:medical plastic waste combination. During the experiments, the effect of the equivalence ratio is examined in the range of 0.20–0.32, and the effect of bed temperature is determined in the range of 750–900 °C. In this present investigation, the experimental work are carried out in a 10 kW fluidized bed gasifier, and the following process parameters are analyzed such as H2/CO ratio, product gas composition, hydrocarbon gas composition, carbon conversion efficiency, cold gas efficiency, calorific value, tar content, and product yield. From the experiment result, it showed that tar and char yield decreased, but the gas yield, carbon conversion efficiency, and cold gas efficiency increased for different equivalence ratios and temperatures. Gas product like CO increases from 26.2 to 32.2%, H2 increases from 36.9 to 52.6%, and the H2/CO ratio increased from 0.15 to 0.45 mmol/g as a function of temperature. But the CO2 concentration decreases from 14.9 to 13.3%, and CH4 also shows a slightly decreased. According to experimental results, a higher bed temperature is favorable for syngas generation and other gasification performance parameters.